JPS57157660A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS57157660A
JPS57157660A JP56042846A JP4284681A JPS57157660A JP S57157660 A JPS57157660 A JP S57157660A JP 56042846 A JP56042846 A JP 56042846A JP 4284681 A JP4284681 A JP 4284681A JP S57157660 A JPS57157660 A JP S57157660A
Authority
JP
Japan
Prior art keywords
circuit
specific bit
error
detecting
pseudorandom code
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56042846A
Other languages
Japanese (ja)
Inventor
Shigeru Yamazaki
Norio Tajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56042846A priority Critical patent/JPS57157660A/en
Publication of JPS57157660A publication Critical patent/JPS57157660A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H04J3/0605—Special codes used as synchronising signal
    • H04J3/0611—PN codes

Abstract

PURPOSE:To make a pseudorandom code have not only a function as frame synchronization but also a function of signal transmission, by constituting so that the transmitting side makes an error on purpose as to a specific bit of an pseudorandom code, and the receiving side detects a code error of the specific bit. CONSTITUTION:An error is generated in a specific bit of a pseudorandom code, and is multiplexed with other transmission signal train by a multiplexing circuit 5. From a synchronizing circuit 9, a pseudorandom code generating output is inputted to a specific bit detecting circuit 7. A signal error detecting output is inputted to an AND circuit 11 and an error rate detecting circuit 12. If there is a signal error detecting output when specific bit detecting signals are outputted, in the specific bit detecting circuit 7, a timing circuit 13 is stated, and those detecting signals become counting inputs of a counting circuit 10.
JP56042846A 1981-03-24 1981-03-24 Signal transmission system Pending JPS57157660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56042846A JPS57157660A (en) 1981-03-24 1981-03-24 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042846A JPS57157660A (en) 1981-03-24 1981-03-24 Signal transmission system

Publications (1)

Publication Number Publication Date
JPS57157660A true JPS57157660A (en) 1982-09-29

Family

ID=12647359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042846A Pending JPS57157660A (en) 1981-03-24 1981-03-24 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS57157660A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61274538A (en) * 1985-05-30 1986-12-04 Nec Corp Method for transmitting control signal in digital transmission system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351916A (en) * 1976-10-21 1978-05-11 Fujitsu Ltd Data signal transmission system
JPS5389608A (en) * 1977-01-18 1978-08-07 Nec Corp Multilevel code transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351916A (en) * 1976-10-21 1978-05-11 Fujitsu Ltd Data signal transmission system
JPS5389608A (en) * 1977-01-18 1978-08-07 Nec Corp Multilevel code transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61274538A (en) * 1985-05-30 1986-12-04 Nec Corp Method for transmitting control signal in digital transmission system
JPH0588580B2 (en) * 1985-05-30 1993-12-22 Nippon Denki Kk

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